
package com.vhukze.utils;


import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;

public class Base64Utils {
	    /**
	     * 图片转化成base64字符串
	     * @param imgPath
	     * @return
	     */
	    public static String GetImageStr(String imgPath) {// 将图片文件转化为字节数组字符串，并对其进行Base64编码处理
	        String imgFile = imgPath;// 待处理的图片
	        InputStream in = null;
	        byte[] data = null;
	        String encode = null; // 返回Base64编码过的字节数组字符串
	        // 对字节数组Base64编码
	        BASE64Encoder encoder = new BASE64Encoder();
	        try {
	            // 读取图片字节数组
	            in = new FileInputStream(imgFile);
	            data = new byte[in.available()];
	            in.read(data);
	            encode = encoder.encode(data);
	        } catch (IOException e) {
	            e.printStackTrace();
	        } finally {
	            try {
	                in.close();
	            } catch (IOException e) {
	                // TODO Auto-generated catch block
	                e.printStackTrace();
	            }
	        }
	        return encode;
	    }

	    /**
	     * base64字符串转化成图片
	     * 
	     * @param imgData
	     *            图片编码
	     * @param imgFilePath
	     *            存放到本地路径
	     * @return
	     * @throws IOException
	     */
	    @SuppressWarnings("finally")
	    public static boolean GenerateImage(String imgData, String imgFilePath) throws IOException { // 对字节数组字符串进行Base64解码并生成图片
	        if (imgData == null) // 图像数据为空
	            return false;
	        BASE64Decoder decoder = new BASE64Decoder();
	        OutputStream out = null;
	        try {
	            out = new FileOutputStream(imgFilePath);
	            // Base64解码
	            byte[] b = decoder.decodeBuffer(imgData);
	            for (int i = 0; i < b.length; ++i) {
	                if (b[i] < 0) {// 调整异常数据
	                    b[i] += 256;
	                }
	            }
	            out.write(b);
	        } catch (FileNotFoundException e) {
	            // TODO Auto-generated catch block
	            e.printStackTrace();
	        } catch (IOException e) {
	            // TODO Auto-generated catch block
	            e.printStackTrace();
	        } finally {
	            out.flush();
	            out.close();
	            return true;
	        }
	    }
	}